level: LIQUEFACTION OF GASES LEVEL 2
Questions and Answers List
level questions: LIQUEFACTION OF GASES LEVEL 2
| Question | Answer |
|---|---|
| What compounds have cubic forms | • Sodium Chloride • Halite • Table Salt • KBr • LiCl • RbI • MgO • CaO • AgCl |
| What compound is a tetragonal form? | • Urea |
| What compound is a rhombic form? | • Iodine |
| What compounds have monoclinic forms? | • Sucrose • Table sugar • Rectangular prism with a parallelogram as its base • Beet sugar |
| What compounds have triclinic forms? | • Boric acid (aka borax) • 3 axes of different lengths intersecting at oblique angles |
| The property of crystallizing in two or more forms with distinct structure | • Polymorphism |
| Solids that have more than one crystalline form | • Polymorph |
| Theobroma Oil Polymorphic forms | • Unstable gammar form (18C) • Alpha form (22C) • Beta prime form (28C) • Stable beta form (34C) |
| What are the types of Polymorphism? | • Enantiomorphic (change is reversible) • Monotropic (change is unidirectional) • Isotropic (identical in all directions) • Anisotropic (different in all directions) |
| (change is reversible) | • Enantiomorphic |
| (change is unidirectional) | • Monotropic |
| (identical in all directions) | • Isotropic |
| (different in all directions) | • Anisotropic |
| A co-crystal created out of different solvents when a pharmaceutical solid is synthesized through chemical methods, purifications & crystallizations. | • Solvates/Pseudopolymorphs |
| Amorphous Solids characteristics | • Aka glasses or supercooled liquids • Non-crystalline; no definite order • No definite shape and no definite melting poits • Tend to flow when subjected to pressure • Amorphous form of drug is readily absorbed and therpeutically active |